<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>

</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        class App extends React.Component {
            state = {
                isHot: true
            }
            render() {
                const { isHot } = this.state;
               if(isHot){
                return(
                    <div>
                        <h1>123</h1>
                        <p>456</p>
                    </div>
                )
               }else{
                return(
                    <div>
                        <h1>abc</h1>
                        <p>def</p>
                    </div>
                )
               }
            }
  
          
        }
        const root = ReactDOM.createRoot(document.getElementById('app'));
        root.render(<App/>)

    </script>
</body>

</html>